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Measuring Instruments
435B
HP 435B Service Manual
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M
o
d
e
l
435
Β
O
p
e
r
at
i
o
n
CA
L
C
UL
ATI
N
G
ME
AS
UREMEN
T
UN
C
ER
TAI
N
TY
1
.
Ca
l
c
ul
ate
t
h
e
r
eflect
i
o
n
coe
ffi
c
i
e
n
t
fr
o
m
t
h
e
g
iv
e
n
S
WR
.
P
o
w
e
r
Se
n
so
r
#1
P
o
w
e
r
Se
n
so
r
#2
P
o
w
e
r
So
ur
ce
S
WR
=
1
.5
S
WR
=
1
.25
S
WR
=
2
.0
1
.5-1
1
:25-1
2
.0-1
ρι
1
.5+1
ρ
2
1
.25+1
Ps
=
2
.0+1
_0
.5
0
.25
_1
.0
2
.5
2
.25
3
.0
=0
.2
=0
.111
=0
.333
2
.
Ca
l
c
ul
ate
t
h
e
r
e
l
at
iv
e
p
o
w
e
r
a
nd
p
e
r
ce
n
tage
p
o
w
e
r
mi
s
m
atc
h
un
ce
r
ta
in
t
i
es
fr
o
m
t
h
e
r
eflect
i
o
n
coe
ffi
c
i
e
n
ts
.
An
ini
t
i
a
l
r
e
f
e
r
e
n
ce
l
e
v
e
l
o
f
1
i
s
ass
um
e
d
.
P
U
=
[1
±
(
ρ
η
ρ
s
)]
2
Ρυ
l
=
{1
±
[(0
.2)(0
.333)]
}
2
PU,
=
{1
±
[(0
.111)(0
.333)]
}
2
=
{1±0
.067}
2
=
11±0
.037}2
=
1
.067
1
2
a
nd
10
.933
1
2
=
11
.037
1
2
a
nd
10
.963
1
2
=
1
.138
a
nd
0
.871
=
1
.075
a
nd
0
.927
%v
PU
=
(PU-1)
100%
ο
%v
PU
I
=
(1
.138-1)
100%
ο
=
(0
.138)
100%
ο
=
13
.8%
ο
%v
PU
,
=
(1
.075-1)
100%
ο
=
(0
.075)
100%
ο
=
7
.5%
ο
ρ
=
S
WR
-1
S
WR
+1
R
e
l
at
i
ve
P
owe
r
Un
ce
r
ta
in
t
y
P
e
r
ce
n
tage
P
owe
r
Un
ce
r
ta
in
t
y
a
nd
(0
.871--1)
100%
ο
a
nd
(--0
.129)
100%
ο
a
nd
-12
.9%
ο
a
nd
(0
.927--1)
100%
ο
a
nd
(-0
.073)
100%
ο
a
nd
-7
.3%
ο
F
igure
3-6
.
Calculating
M
easurement
U
ncertainties
(1
of
2)
3-
1
1
27
29
Table of Contents
Table of Contents
4
General Information
9
Introduction
9
In Struments Covered by Manual
9
De Sc R Iptio N
9
O P B Tio N S
10
Atte Ry
11
Sa F et y Co N S ID E R at I O N
11
HP M Odel 435 Β a
11
R Ecommend Ed Test Equipment
11
I Nstall Atio N
13
Introduction
13
Preparation for Use
13
T I a L in S P Ect I O N
13
Mete R
14
Ower Cable
14
Oltage Selection
14
L Ect I O N
14
Interconnections
14
L I N E V Oltage Selection
14
Operat Ing Environment
15
B Ench O Peration
15
F R Ac K Moun Ting
15
M Ains Plu Gs Available
15
B Atte Ry Installation
16
Ow er Mete R
16
3-12 . Battery
20
Rea R Pa N E L Co N Trol S, Connectors and Ind Icato R S
22
Oper Ator's C He Cks
23
O Per Ating Instru Ct I O N S
25
Per Atio N
26
Specified Uncertainties
27
Calculating M
29
Eas Ureme Nt un Certa Inties
29
Mismatch un Certai Nties
30
Calculating M Eas Ureme Nt un Certai Nty
31
Introduction
32
In Eas
32
R St Case
32
CC Ur
32
Ac Ur
32
Perf O Rm an Ce te Sts
34
Eco Rd
34
Rf Rm Ce Tests
34
Power Reference
34
Est
35
Z Ero Carryover Test Set up
35
Erform Ance Est
37
Est
38
Ad Ju St Men Ts
40
Introduction
40
N S
40
Ad J
40
Locations
40
Specifications
40
Actory Selected Co Mponents
40
Ower Reference Oscillator Level Adjustment
42
P Ower Reference Osc Ill Ator Level
43
Multivibrator Adjust Ment
45
Ower Meter Adjustments with 50Ω P
47
P Ower Meter Ad
47
Owe R Sensor
48
O W E R M Ete R Ad J U St M E N Ts Wi T H Ca Libr Ato R
50
With Calibrator
50
Repl Ac
52
Section E ABLE P V I a RTS
52
Introduction
52
Abbreviations
52
E Pl Acea Bl E P
52
Actory Se Lecte D Parts (*)
52
Orderin G in St Ructions
52
Arts Provi Sioning
52
Epl Acea Ble Parts
52
Ma Nu al Chan G es
63
Introduction
63
Manual Change in Structions
63
Servic E
65
Introduction
65
Sa F et y Co N S ID E R at I O N
65
H Eets
65
Fr O N T
69
Ower Sensor
77
Sc Hem at IC
78
Ge Neral Se Rvi Ce Inf Orm at Ion
79
Ca Libr Ato R
79
Oa Rd S
81
Ρ/Ο Α4 Ass Embly
82
Ρ/0 Α
86
P Ower S Upply
89
Operational Amplifiers
90
Ρ/Ο Α4 Assem Bl y
92
Ρ/Ο Α4 Ass Embly
99
Ower Refere Eference Assembly
107
Sc Hematic Diagram
107
Ocatio Ns
108
Ero
110
5
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HP 435B Specifications
General
Brand
HP
Model
435B
Category
Measuring Instruments
Language
English
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